These points are also on the negative side of the x axis, at -pi/4 and -pi/2. When we move along the x axis, notice what happens to the y value. On the left side of zero, tangent is negative. At x=-pi/4, tangent=-1.
The Independent Online. David Cameron may have called a referendum on the EU to blackmail Europe, according to Vladimir Putin. The Russian president also questioned Mr Cameronâs decision to call the vote, as it has caused a âgreat problemâ.
President of Russia. The President of the Russian Federation (Russian: Ð¿ÑÐµÐ·Ð¸Ð´ÐµÐ½Ñ ÑÐ¾ÑÑÐ¸Ð¹ÑÐºÐ¾Ð¹ ÑÐµÐ´ÐµÑÐ°ÑÐ¸Ð¸, tr. Prezident Rossiiskoi Federatsii) is the elected head of state, Supreme Commander-in-Chief, and holder of the highest office in the Russian Federation. The current President of Russia is Vladimir Putin.